do you know if $array += $other has the same memory usage as array_merge?

do you know if $array += $other has the same memory usage as array_merge?

Never tested such approach. In general, foreach gives good memory control and very little performance penalties so it's widelly adopted (for very large arrays).

EDIT: @icewind1991 i've tested with a simple script, and indeed it uses less memory than array_merge!

12683KB for $array += $other and 20879KB for array_merge for the same numeric data set (basically 2 arrays of 250K numbers).
So almost 40% less memory usage in a small test! Good spot :) (tested at https://onlinephp.io/ with PHP 8.2.12)

But i'm not familiar with the result of the merge in this case (preservation of keys, associative and indexed arrays...).
If you believe it's a better approach in this specific case, please let me know.

I'm not actually sure if += works here since it overwrites items with the same (implicit) keys